Computing-machine.



J. T. HURLEY.

COMPUTING MACHINE.

APPLIOATION FILED AUG. a1 r910.

Patented May 28, 1912.

10 SHEETS-BHEET l.

IIWEIIT WITNESSES.

will; runs mm. mm. msmucm. u c

J. T. HURLEY.

COMPUTING MAGHINE.

APPLICATION FILED AUG. 31, 1910.

1,027,847. Patented May 28, 1912.

IO-SHEETSTSH ET 2,

J. T. HURLEY.

COMPUTING MAGHINE.

APPLIOATION FILED AUG. 31, 1910.

1,027,847. Patented May 28, 1912.

10 SHEETS-SHEET 3.

W NESSES J. T. HU'RLEY. comwrme MAGHINE. APPLIUATIGH TILED AUG. 31, 1910.

Patented May 28, 1912.

10 SHEETS-SHEET 4.

INVEN J. TLHURLEY.

COMPUTING MACHINE.

APPLICATION FILED we. 31, 1910.

' 1,027,847, Patented May 28, 1912.

10 sums-$11221" 5.

WITNESSES J. T. HURLEY. COMPUTING MACHINE.

APPLICATION FILED AUG, 31-, 1910.

1,027,847, Patented May 28, 1912.

10 BHEETSBHEET 6. My

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" I 9 O" A 7 0 l I I I s 377 WITNESSES 3 HURLEY. UGMPUTING MACHINE.

APPLICATION FILED AUG. 31, 1910.

Pa'iented May 28, $912 J. T. HURLEY. COMPUTING MACHINE. APPL'IQATION FILED AUG 31, 191.0.

1,027,847. Patented May 28, 1912.

10 SHEETS-SHEET 8.

q WITNESSES J. T. HURLEY] COMPUTING MACHINE.

APPLIOATION FILED AUG. 31, 1910.

Patented May 28, 1912.

10 BHEETS-SHEET 9.

-J. T. HURLEY. COMPUTING MACHINE APPLICATION-FILED AUG. 31, 1910 Patented May 28, 1912' 10 SHEETSSHEET .0.

FIG /6" FIG 1 WITNESSES fau's'rm 'r. HURLEY, or ELIZABETH, new JERSEY,

Specification of Letters Yatent.

comrnrmo-msonmn.

Patented May 28,1912.

apau'cauonfiiea August 31, 1910. SeriaLNo'. 579,824.

Tolall wliom it may concern i Be 11; known that I, JUSTIN T. Hcnnnr, a citizen of. the United States, residing ,at

Elizabeth, in the county of Union and State of New Jersey, have invented-new and useful Improvements in Computing-Machines, ofwhich the following is a specification.

I My invention relates to computing mech anism for performing the arithmetical processes of addition or subtraction and is of novel and necessarily compact construction comprising various mportant devices comtuned and correlated and also simplified, af-

- fording convenient accessibility to the oper- Working of my present invention with conating parts.

The mechanism illustrated herein has been designed chiefly for attachment to and incorporation with the mechanism of various forms of typcwriting machines, preferably those equipped with horizontally arranged type-bars and standard key-boards, commonly known as visible writers, but it is obvious that the mechanism may be assembled andused for purposes of computation independently of a typewriting machine.

fMy computing machine is of the class or type illustrated in my co-pending applications Serial Nos. 533,109 filed Dec, 11th,

'.'1909, and559,7(l7 filed May 6th 1910, the

present improvements applying more particularly to the latter application in which thegeneral construction and mode of operation are explained in detail, but the description given herein will readily explain and allord a clear understanding of the interstructions illustrated in the co-pending applications referred to.

More specifically considered my invention provides tlltffOllOWlllg novel. teatures, amongothers a novel actuator or driving mechanism operated directly from the machine key-bars through cylindrical cams and radial transmission arms; a new combination of reversing pinions and component parts; an improved means for locking the key-bars against premature retraction and also for preventing downward movement of the key-bars if not fullv restored: an imroved transmission 'ear sector. and also P r:

I novel means for connecting and disconnecting the gear sector with the actuator or reversing pinions. Furthermore an improved traveling actuator gear-wheel adaptedto engage externally with the computing groups and .actuate individually the flexible digit belts; a traveling nut provided with a yoke adapted to move the actuator wheel transversely and also adapted to unlock at proper intervals the belt ,carrying'mechanism; an improved transference or carryover device; a novel means operated by the traveling nut for unlocking and locking the transference mechanism; an improved means for detachably locating the computing groups in connection with the actuator mechanism; a novel selector means controlled by sectional selector-leads combined with tabulator stops for pre-selecting for computation successively the several belts.

, The selector-leads are also employed to compensate for the insertion of commas or for the insertion of a decimal point where monetary values are being represented, thereby obviating the necessity for employing two differently spaced sets of computing groups in the calculating processes.

Other new features are the improved means employed for preventing escapement of the platen carrier until the various parts displaced by a key depression have been restored to normal; an improved device utilized in retaining the booster lever upon'the cam hub of each upper pulley after the lever has passed through the inclined runway and out at the vanishing point. means are provided for each cam guide msuring against inertial over-running of the transmission shaft, and also an eliicient device for locking two or more keys if inadvertently struck at the same time, which latter device prevents rebounding of the actuator mechanism caused by variable pressure upon a numeral key.

All-accidental movement of the parts may be corrected and consequent errors eliminated by simple adjusting and checking means provided in the mechanism and herein described.

Figure 1 is a front elevation of whatis commonly known as a visible typewriter embodying my invention and illustrating two metal cased computing groups seated in op 'ating position upon the slotted supporting racks; which rackshave a capacity pf six groups of thesize shown. The transmlssion shaft provided with radial arms, and the upright guides for supporting the cylin drieal cams may also be observed. The letter L key connecting by dotted lines with the entreme right cam guide is employed to represent digit 1. Fig. 2 is a left end eleva- Important .35 gitudinally'ofthe topmost or actuator shaft.

tion of Fig. 1, and is partly broken away to more clearly reveal the upright guides, slotted to receive the transmission shaft. The rearwardly extending winding shaft provided with one keyed pinion, and one 1 loose pinion gearing'with the platen carrier return sprin casing mayfbe. clearly observed. The .positionally placed selectorlead engaging the toothed controller and in turn being engaged and stopped by the swinging tabulator arm may also be seen. Fig. 3 is arear elevation of the machine illustrated in Fig. 1. vThe carrier return casing and the spur gear which I have supplied thereto.f- ,.The swinging arm carrying".

spring 'escapement commonly applied to typewriting machines is broken away to show the position of the spring, the spring a lockingpinion is operatedby the radial armrigidly;connecting tothe toothed con troller, which may be observed in engagement with one of the selector-leads. The

. rack carrying the leads moves with the platen carrier. .Fig, 4 is an enlarged front elevation of theactuatormech'ani'sm in sectionfa'n'd-broken away, showing also the upright guides carrying the actuating cams.

' Que ofjltheguides' onthat attached to key 9gis represented in a downward or key de- "pressedpositionwith the radial arm resting .a ainst the foreground side of the cam. :T 6 small shaft beneath the transmission 1 shaft carries keylocking pins. The spirally threaded shaft carries a traveling nut, the

y'oke ofiwhich moves thel actuator wheel lon ig. 5 re'presents' an enlarged elevation taken approximately on lines fiof Fig. 4 showing thetransmission sector which is operated by the transmission shaft. There versing pinions operated by the three position lever near. the top of this view mesh with each other but alternately with the transmission sector. Fig. 6 is a view looking downwardly showing the reversing pinions, and the bracket supported, angled reversingrod, seen in F 5. Fig. 7 is a view on line 7+7 of Fig. 4 but including posi- 0 traveling nut.

tionally .the cylindrical cams with the exception of that operated by key 1 which in this view would bein the background or beyond cam 9. Key-bar 2 shown herein illustrates the device employed for connecting with the upright guide rods and cams Iig group being engaged by the. actuator rieel. Fig. 8 is a to operate the transmissioigi'shaft- A viewis also aiforded'of a compu viewon line 8 8 of Fig. 4 looking toward the left, illustrating particularly the wind- .ing'shaft and the large gear wheel operated "thereby for supplying movement to the The pivoted lever shown herein is employed for rocking the locking rod and thereby freeing a key. F ig. 9 is an enlargedfront elevation, the belts and casing omitted, revealing the interior arrange ment of a computing group mechanism with. certain parts broken away and 0111615013112 ted orin section, showing particularly the"; transference gears and the locking pinion for engaging therewith, Fig. 10 represents a rear view of Fig. 9, the pulley locking levers and the pinion for engaging the actuator wheel being clearly illustrated. Fig. 11-

is a sectional and broken view taken on line 11-1]. of Fig. 9 and includes the large spur wheel belonging. to the upper pulley next at the left. Fig. 12 is a view on line 12-12 of Fig. 9 but omitting the transference locking pinion and its supporting arm. go The small gear wheel, the large gear wheel and the star wheel shown upon the center or transference shaft are secured together and operate as one. Fig. 13 1S taken on line 1313 of F ig; 10 showing the depressed 5 surface formed in the side ofan upper pul ley and the booster} cam formed thereon. Fig. 14 illustrates the throw-in part of a sectional selector-lead, the left-hand edge is widened and will be engaged by the tabu- 9o lator arm. F ig. 15 shows the throw-out part of a selector-lead which as will be observed 15- narrow and will not be-engaged by the tabulator arm. Fig. 16 is a broken top view of the toothed controller and of its radial" arm carrying an anti-friction roller. Fig.

17 is an upright sectional view of the con v troller shown in Fig. 16 illustrating the stationary pin upon which it oscillates. Fig.

18 represents a .combined throw-in and throw-out part of a selector-lead to be employed when a comma, decimal point or other character is to be inserted in the figure column. I

Similar figures of reference indicate similar parts throughout the several views.

Actuator mccham'sna-The letter L keybar and thenumcral key-bars designated 1, i of a typewriting machine have been pivotally provided with a slotted link 2 having at its upper extremity a disk-like surface 3 provided with a hole through which pro iects one end of a threaded arm 4, which arm is securely connected to the elbow -5 forming an integral part of the upright-"11 guide 6. The upright guide 6 is connected to the link 2 by the nuts '1, one of which is, screwed on't-he threaded'arm 4 and rests upon the upper surface of disk 3, and one likewise screwed uponthe threaded arm but in cont-act with the. under surfaoepf'diskZ-l,"

thus afi'ording a secure connectionphut'per mitting. the distance between the upright ample room between the front casing of the machine and said shaft to accomi'nodate other specified parts. The shaft 9 extending as it does through slots or openings S acts as ll suitable guide for all of the up right guide rods (3 to the rearward side of each of which issupplied a cylindrical cam 10, one cam representing each numeral. key. The position of the cams upon their respectire upright guides are proportionately graduated. the cam representing icy 1 being lowest and cam 9 being highest for the pur-' pose of supplying to the computing mechanism a proportionately increased ratio of movement from key 1 to key 9, or movement equal in degree to the value of the particu-, lar key depressed. The radial arms 11 one 'for each numeral key are keyed to transmission shaft and are each prorided at its free end, at right angles thereto, with a pin 12 upon which is mounted a sleeve 13 nor-.

mally in contact with the exterior surface of its respective cylindrical cam 10. \Yhen any particular numeral key is depressed. its corresponding *adial arm will follow the cam surface the required distam'e and will ride during the remainder of the stroke up into the slot or opening 8 although bearing upon the innei 'surface of the upright guide.

The double angle of elbow 5 will bring theline of draft approximately through the center of cams 10 and through the pivoted link 2 to the key-bars. Theupright guides 6 are furthermore prov ded with a shoulder 11, Figs. sk t-S, nearl flush with the plane left-hand surface of cam 10, and its lower edge forms an are 15 whose radius is slightly less than that described by the free end of arm 11. The vertical edge of shoulders ll or the side nearest cams 10 forms an are 16 with a radius equal to the radius of cam 10 plus the external diameter of the sleeve 13, the same dimensions applying to each of the guidestlr'l h'e are 16 begins at the lower edge ofshoulder 1t and extends upward on guides representing keys 1 to 5 to a point equal to the center of cam 10, but above this, point the edge is formedparallel with the left-hand edge of slot 8, Fig, 7, but at a distance therefrom equal to the diameter of the sleeve 13. The are 16 is adapted to act as a guide for arms 11, thereby preventing accidental; rebounding from the surface ofcam 10 'which may be caused by variable pressure upon a key.

The are 15 upon the guide representing key 1 is shortest. the length being proper; tionally increased up to the guide representing key 9, Figs. 7-8, and is adapted to prevent keys bcingdepressed while another key is partly depressed hen operated by their respective cams the arms 11 will each be given a different degree of'throw, therefore it will be understood that if two or more keys are struck simultaneously the lat eral pins 12 will become locked or jammed in. the guide-way formed betweep the cam 10 and the are 16. Any particular key being depre.--'sc .l it arm 11 will follow the circumferential surface oteam 10 and the are 16. The'other eight arms on shaft 9 must necessarily more. therewith, but will swing beneath are 15 thereby retaining the guides 6 against accidental movement.-

T he shoulders 11 on guides representing keys 1 to 7 inch .f e are each provided with a rectangular chamber 17, Figs. -1--T, having an opening both in front and in the rear through which freely swings a short stop arm 18 secured to the under side of transmission shaft 9. Each of the stop arms 18 projects at a different angle from shaft 9, the arrangement being proportioned to correspond with the position of a radial arm 11 with which it i: adapted to eo-act. The de pression of any particular key will displace guide 6 downwardly causing transmission shaft 9 to rotate and ln'inging the stop arm 18 as viewed in Fig. 7, into contact with the right-hand edge of the elongated slot 8 which is the inner surface of guide (3, thus effectually preventing inertial over-actua-' tion of shaft 91 The. other arms 18 partaking of the movement of shaft '9 will swing freely through the right-hand opening of their respective chamber 17 illustrated particularly in Fig. 1. The guides representing key S and key 9 are not supplied with a chamber 17, the arms 11 correspondingt-o those keys being stopped by the nose 19 extending downwardly from the edge of shoulder 14 as Viewed in Fig. 8'. Upon depression of key 8 the nose 19 shown on guide 6, in the foreground and representing key 9 will be engaged by its respective. arm 11, thereby stopping the rotation of shaft 9 at the proper point. Likewise upon depression of key 9 the arm 11 representing key 8 will engage the nose 19 provided upon its respective guide, but located proportionately farther to the left or toward the front to compensate for the angular difference be tween the two arms.

Projecting from the left end of transmis sion shaft 9 is an arm 20 to which is'attached one end of a spring 21, the other end of the spring being attached to the machine frame and adapted to assist in returning the shaft 9 to' normal after displacement. Below and slightly in front of trans mission shaft 9, and extending parallel therewith is a smaller shaft 22 rot-atively socketed at each end in the machine frame, andprovided with an arin 23 to which, 1s

515 i -.ing either of the pins 38 projecting literally from the side of lever 35, the object being shaft, are the locking pins 25, one of which is placed opposite each upright guide 6, and are each provided with a trident shaped end or three chisel shaped teeth 26 either of which is adapted to engage in the serrated surface 27 provided upon one side of each ,upright guide 6. The locking pins 25 normally xtend horizontally, and their radial swing is greater than the distance separating the lock shaft 22 and the serrated surface 27, therefore when upon a key depression guide 6 is displaced the serrations 27 will engage and crowd the pin 25 downwardly, but the chisel teeth 26 being held against the serrated surface by spring 24 will prevent-retraction of guide 6 until the key is fully depressed, in which position the pin 25 will be engaged by a nose 28 projecting from the side of guide 6, and will be given an additional swing downwardly and free of serrations 27, the purpose of which will be hereinafter specified.

" fully depressed it may be allowed to retract extending from the machine frame.

by utilizing the retracting lever 29, Figs. 1.48, which lever is connected to the machine frame by a pivot 30, and held in normalposition by a spring 31-anchored to and Locking shaft 22 is further provided with a horizOntaIIy'eXtending finger 32,'which when a key is being depressed, rises to the dotted position shown in Fig. 8 where it may be engaged by the operation of lever 29 and pm '25 thereby unmeshed from the serrations 27.

Attached to the typewriting machine frame near the right-hand side and slightly below-shaft 22 is a bracket 33, to which is pivotally connected by the pivot 34 an upwardlyextending disconnecting lever 35 Supp ied with an opening 36 of ample size to accommodate the locking shaft 22 extending through it and also permitting the lever 35 to be oscillated through an arc of about 30 degrees by the action of a finger 37 extending upwardly from shaft 22 and engagto convey the rotative movement of the locking shaft 22 to the lever 35, but in a lesser degree.

At the rightof disconnecting lever 35 and projectingfrom the writing machine frame is an upper bracket 39 and a lower bracket 39", in which-is arranged vertlcally a pin 40 upon which is hinged a sleeve 41 carrying the latter arm being supplied with a stop projecting toward the right or front Fig. 5,

- ter lever partaking of the movement of the four arms-an upright arm 42, a horizontal rearwardly projecting arm 43, a horizontal arm 44 extending toward the left and a horizontal arm 45 extending toward the right, 46 normally resting against the writing machine frame, being resiliently retained by a spring 47 connecting therewith and with the machine frame. Looking downwardly it -wi ll be observed that the hinged sleeve 41 and its arms may swing with a reversed clockwise movement but will be returned to normalby the spring 47. i

Mounted upon the transmission shaft 9 near the left end thereof is a sleeve 48 to which is secured a transmission sector arm 49. The sleeve 48 is provided with 3. rectangular opening 50 through which protrudes a corresponding but somewhat shorter rectangular lug 51 secured to the shaft 9. The sleeve 48 will thereby be caused to r'otate with shaft 9 although adapted to be moved a limited distance lpngitudinally thereof. Attached to the sleeve 48 on the under side thereof and forming a continuation of transmissionsector arm 49, is a semi-circular flange'52, Fig. 5, terminating in a vertical edge in proximity tothe horizontal arm 43 of sleeve41. Rigidly secured to the sleeve 48 and its sector arm 49, and

1s an arm 53 normally supporting the right angle extension 54 of a drop lever 55 which lever is pivoted to the upright arm42 of sleeve 41 by a pivot 56.- The drop lever 55 is provided with an offset right angled extension 57, normally retained above and in proximity to the widened upper extremity of the said disconnectinglever 35 through the intervention of arm 53.

Upon a key. depression the rotational movement of the transmission shaft 9 will cause the sector arm 49 to swing to the left as illustrated in the dot-ted position Fig. 5, and the arm 53'will thereby be raised sufficiently torelease the drop lever 55 allowing it to fall to the dotted position operatively in the path of the widened upper extremity of disconnecting lever 35, which latlocking shaft 22 and finger 37 is caused to move to the dotted'posit-ion. The rotational swing of sector-arm 49,will carry the. semicircular flange 52 to the dotted position overlapping the left, or foreground face of the horizontal arm 43. Upon a restoring movement of the depressed key the shaft 22 operating in advance of shaft 9 will cause the lever 35 to restore, therehv'swinging to the right the, drop lever 55 and also the horizontal arni 43, which latter arm will engage the flange 52 thereby moving the sector-arm 49 laterally toward the left or foreground and out of mesh with the reversing pinions.

Above transmission shaft 9, extending.

parallel therewith and journaled at each end in the writing machine frame is a selector shaft 58 having keyed upon its left end a spur pinion 5i and also-keyed upon its right-hand end a collar provided at points diametrically opposite upon its periphery with the radial projections 61 preferablytwo in number and adapted to serve as a selector shaft stop when engaged by the stop lever 62 which lever is secured to the writing machine frame by a pivot 63 and normally retained from contact with the stop-(5O by a spring (it secured to the writing machine'frame- The lower extremity of stop leverGQ is adapted to remain in contact with a toe formed upon the right angle extension of -a horizontal restoring lever 66 which is connected by a pivot 67 secured in the stationarybracl'tet6S projecting from the writing machine frame.

A lip 69 is formed upon the upper side of sector arm sleeve 48 adapted to remain permanently in contact with the restoring lever 66.. The gear sector arm 49 following complete depression of a key will be laterallv displaced to the left. and the movement" will alsodisplace the restoring lever 66 by which means the toe 65 will cause the stop lever 62 to be moved to the dotted position Fig. '5, and into engagement with one of the projecting stop pins 61. The escapement of the platen carrier following a key depression will occur coincidently with the restorationof the key or slightly in advance of its complete restoration, and as the shaft 58 during a computing process will beoperatively in connection with the platen carrier mechanism receiving rotationalmovement therefrom, the engagement of lever 62 with the projecting stop pin 61 will operate to defer escapement movement until the gear sector arm 49 has been restored laterally to mesh with the reversing pinions. It will be understood however, that the escapen'ient tension of the platen carrier ope 'ating in conjunction with the spring (3-1 of lever (12 supplies power requisite for the lateral restoration of the sector arm 49, but such lat-- eral restoration cannot occur until rotational restoration (of the sector arm 49) has been completed, and the flange disengaged with the arm l of sleeve ii; at which time the depressed key will havebeen fully restored. The transmission sector 49 is provided upon its upper or convex surface with teeth tapered as shown in. Fig. 5 so as to permit of unobstructed lateral ingress and proper gearing relation with theteeth of the reversing or actuating pinions H: and 75.

Above and slightly to the rear of the selector shaft- 58, but parallel therewith, and journaled at each end in the writing machine frame is an actuator shaft- 71 provided with a ridge 72 extending longitudinally over the greater part of its length, the shaft carry pinion Tl.

being also provided near the right hand end with a slot T3 adapted to receive the corresponding internal lip Tl of reversing pinion, H. The actuator shaft 71 will be 'aused to rotate by pinion Tl mounted thereon when the latter has been moved along the slot 73 into engagement ,with the transmission scotor'lf The reversing pinion T5 is mounted freely upon a short shaft To secured at one end in the writing machine frame and remains constantly in gear mesh with pinion It. The U shaped yoke 77 provided with disk-like ends of lesser diameter than are the reversing pinions is freely mounted upon the shaft 71 and straddles pinion H in such a manner that a movement of the yoke longitudinally of shaft Tlwill likewise Pinion T5 is straddled by a similar yoke 77 likewise mounted upon the short shaft 76.

The yokes TT and 77 are each provided with an opening extending across the top and at right angles. with shafts Ti and 76, Fig. '6. From the leftside of the yoke and into the opening extends an angled part 78, and from the right side of the yoke likewise extending into the opening is an angled part 79, the parts being arranged in operative relation to each other so as to accommodate and co-act with the reversing rod 80 and the offset- 81 thereof formed by a parallel and two oblique parts. v T hesaid 'rod 80 is slidably supported in the mortised openings 812 of brackets 83 projecting from the writing machine frame.

To the right or front end of reversing rod 80 is pivoted a link 8st which connects pivotally to a rignt angled reversing lever 85 which lever is pivotally attached to a bracket 86 extending from the writing machine frame. The lever 85 terminates in a finger piece 87, and is held in eitherof three positions by a flat spring 88 secured to the lever and adapted to engage with the indentations 89 formed in the end of bracket 86. The position of lever 8511s depicted in Fig. 5, represents the first or disengaged position and coincides with the position of rod 80, and the reversing pin ions 7- and 75, Fig. 6. Bynioving the lever.

will be moved to the left or rearward and its offset part 81 \brought into engagement with the angled part '78 of yoke 77 thereby moving pinion Tl to the left, laterally, and into gear mesh with transmission sector 19, by which means the actuator shaft 71 may be rotated. Beti'irninglever 85 to the middle position the offset part 81 of rod 80 will be brought operatively against the angled part- 79 of yoke 77 thereby returning the pinion to the first or inactive position. Lever 85 may be moved to the lower dotted position causing the left-hand oblique part of offset 81 to likewise move pinion 75 into geared relation with sector 49 when through the medium of pinion 74 the actuator shaft 71 may berotated in a reverse direction. By returning lever 85 to the middle position the pinion 7 5 may be disengaged with sector 49.

The movements of the mechanism controlled by shafts 22, 9 and-58 may be described as follows: Upon depression of a 10 numeral key the serrated surface 27 of guide 6 will cause the chisel toothed pins 25 to swing downwardly as illustrated in the dotted outline, Fig. 7. As the key approaches the termination of its downward movement the nose 28 on guide 6 will engage and impart an increaseddegree of swing to pin 25 whereby the disconnecting lever 35 will be moved to the dotted position shown in Fig. 5. The rotative movementof transmission shaft 9 will swing the geared sector 49 into a positionillustrated by the dotted outline with its flange 52 overlapping the arm 43 on the left or fo'reground side thereof. The'arm 53 will be raised allowing the drop lever 55 to fall to the dotted position between the free end of lever 35 and the horizontal arm 44 where it will be stopped by the lug 55*. Upon releasing a' key the transmission shaft 9 will not immediately restore, the arms 11 being retained upon that part of guide-6 which forms-the left-hand border of slotor opening 8, and the key milst necessarily partly restore until the arm 11, and its sleeve 13,

regains the circumferential surface of cam 10. The lead thus obtained is quite suiticient to cause a reversal of pins and shaft 22 whereby the disconnecting lever will be caused to engage the rightangled extension 57 of drop lever 55, thereby oscillating the hinged sleeve 41, and bringing the horizontal arm 43 into engagement with the flange 52 by which means the sector gear 49 will be moved laterally from meshing relation with the reversing pinions 74 or 75. This lateral movement. of sector 49 will also displace the restoring lever 66 and cause stop lever 62 to be brought into operative engagement with a projection 61 of the selector shaft stop 60,-after which the guide 6 having retracted sufficiently to allow restoration of radial arm 11 beneath cam 10, the sector arm 49 will thereby be returned which "movement will disengage flange 52 with the arm 43 and also drop the arm 53 into operative position on the left or foreground side of the angle extension 54 of drop lever 55. The sequence will bea return of pins 25 to horizontal and a return oflever 35 to a vertical position followed by an immediate escapement of the platen carrier, as hereinafter explained, thereby rotating selector shaft 58, causing stop 60 to restore lever 62 and also lever 66, 5. which latter lever being in engagement with the lip 69 will return sector gear 49 laterally to initial position. This lateral restoration of sector 49will be accompanied by a reengagement of its arm 53 with the drop lever 55 which. will thereby be lifted out of contact with the lever 35 and returned along with sleeve 41 to normal by the spring 47.

In the operatively dis-engaged position of reversing pinions 74 and 7 5, Fig. 7, z. 6., with the reversing lever 85 in middle position, the numeral keys may be' operated for ordinary business purposes, provisions having been made for preventingv lateral displacement of the gear sector arm 49, consisting of a latch formed by a downwardly extending rod 90 pivoted to the horizontally disposed part of lever 85, and slidably retained against the writing-machine frame by a strap 91. The rod 90 is provided near, its lower end with a nose 92. Another downwardly extending rod 93 pivotally swinging from the bracket 94 is provided near its lower or free end with two rearwardly facing lugs 95, and also supplied with a nose 96 which when the lever is in middle position will be operatively in contact with the nose 92 of rod by which meansthe free end of swinging rod 93 will be moved rearwardly, and the angled extension 97 of drop lever 55 will be latched between the lugs 95, the said lever 55 being thereby prevented from dropping if released. by the arm 53/ Ifthe lever 85 be moved to the upper or to the lower, position the noses 92 and 96 ,will be disengaged and the swinging rod 93 removed, by the act-ion of spring 98 fron'i'latching engagement with lever 55.

Selector m-cizam'am.-A rearwardly extending winding shaft 99, journaledat each end .in the writing machineframe is located preferably above the actuator shaft 71 near its, left end, at about right angles therewith and carries a keyed bevel gear 1% adapted to engage with-a corresponding bevel gear 101 secured to the right face of a spur gear wheel 102, which wheel is constantly in gear mesh with the said pinion 59 of selector shaft 58. The said wheel 102 is rotatively mounted upon a short shaft or pin 103 projecting from the left-hand frame of the writing machine. The winding shaft 99 is furthermore provided near its left or rearward end with a keyed pinion 104, and also provided with a loose pinion 105 located alongside, but to the left of pinion 104, Fig.

i 2. Pivotally attached to the framework of the writing machine is a platen carrier return spring 100, also the tension escapement ratchet wheel 10? and return spring casing 108, to the latter being secured a large spur gear 109 adapted to be constantly in mesh with the loose pinion 105 of shaft 99.

A swinging arm 110 mounted on a pivot. 111 and pressed downwardly by a spring 112 is supplied upon its lower end with a pin 11 3 upon which is rotatively mounted a locking pinion 111 adapted .to be swung into mesh with and lock together at desired intervals the pinions 101' and 105 by which means the movement of the spring casing 108 and its gear 109 will be imparted to the winding shaft 99.

The horizontally disposed continuation of swinging arm 110 terminates in a widened semi-circular part 115, about mid-way upon the upper surface of which rises a tapered part 116 formed with a flat top. troller 117 rotatively mounted upon an upright pin 118, projecting from the top of the writing machine frame, is provided upon its upper extremity with a head 119 having radiating spurs 120. Project-ing from the controller 117 a radial arm 121 carrying an anti triction roller 122 adapted to roll upon the semi-circular part 115 of swinging arm'110. A spring 123 is attached to the radial arm 121 and connects with the horizontal continuation of swinging arm 110 by which means the roller 122- is resiliently held when moved upon the tapered part 116, and the arm 121 is. parallel with the swinging arm. 110 the arm 110 being then in a locked position.

The pitch of the radiating spurs 120 will determine chiefly the amplitude of swing supplied to the radial arm 121, any tendency to excess being controlled. by the spring ,123, but if desirable to minimize the radial swing of arm 121 I may employ features similar to that obtained by the relation of the disconnecting lever 35 with lookengaged by the throw-in part of the selector lead 128, and the pinion 114 is held in mesh by moving the roller 122 to and upon the fiat top surface of the raised part 116, which part is of suitable width to accommodate the roller. The pinion 11 1 will be retained in mesh until the platen carrier has moved suftiiently to bring the throw-out member 128 into engagement with the controller 117, which will impart a reverse movement to thearm '121, bringing the roller to the position shown in Fig. 1G and allowing the pinion 111 to unmesh.

The platen carrier 124 connecting with the spring casing 10S.-by thereturn tape 125, Fig. 3, (or if preferable by a'gear wheel) is similar to the carrier and arrangement of return parts in general use. Securely mounted upon the rearward side of carrier 124 isa bar 126 provided upon both sides with a plurality of slots or grooyes 127 forming a rack similarjto thosein common use for adjustably securing ta'bulator stops, and inthis invention the rack is utilized. (but not necessarilyso) as a combined tabulator stop. and selector-leads rack contain-- 'lector-leads 12S ant A con-.

ing the adjust'ably )ositioned sectional sel 12 engaging in the slots 127. The selectm'-leads illustrated in Fig. 3. are composed oi the throw-in part- 128, Fig. 11. and the thrmv-out part 128*, Fig. 15, and are each suppliml with one short arm, and one lengthened arm, the latter arm terminating uponthe inner side in a horizontally projecting tooth. or spur 129 adapted, when properly seated upon the rack 126 and moving with the carrier 12 t, to be brought into engagement with the spurs 120 of controller 117 which as shown in Fig. 2 is located directly beneath the rack 126.

The longer arm or the throw-in part of lead 128 is much wider than is its short arm, or either of the arms on part 128 and when properly in position the wider arm should extend to the left or rearward of the rack 126. but. the part 128 should be placed with its longer arm on the right or front side of said rack 126. A combined throw-in and throw-out section 130, Fig. 18. formed by combining, reversely, two of the sections 128 is adapted for adjustment iu'ionrack 126 between the sections 128 and 128 of the leads,the object therefor being as hereinafter explained, to compensate for the insertion of a comma or of a decimal point in the printed columns.

A tabulator stop arm 131 commonly em ployed in connection with writing machines, connects with the tabulator key bar by a link 132 and is adapted to engage the widened side or part of the selector-lead 128 thereby intercepting the transversely moving carrier at pie-arranged positions. The narrower arms of the diiterent sections composing the selector-leads are adapted to pass without being intercepted by the stop arm 131.

By referring to F 1g. 3 1t will be observed that the locative arrangement of rack 126 is intended to give a lead relative to the platen carrier 121, 5. 6., locating the operative center of the former in advance or to theright of the operative center of the platen, by which arrangement the controller 117 and the tabulator stop arm 131 may be operatively located a suitable distance to the right of the writing machine center.

The number of selector-leads 128 employed including the throw-out parts 128 will correspond to the. number of computing groups to be operated, the number ofleads shown in Fig. 3, representing four separate The part 128 having been placed upon the rack in accordance with the desired location of a printed column, the throw-out section 128 should be-placed to the left and in a position conforming with the lowestorder of the computing group represented. If it be desired to insert. in the column a efa ry computation, a combination section .rier will bring the throw-out part 128 into engagement with the controller 117 where? the arm 121 will be returned. to the first osition, thus disengaging the locking pinion '114 wit-hpinions 104 and 105. If the carrier be pushedto the left ,(Fig. 3) as for beginning a new line, the operative engagement of the selector leads will be reversed, the throw-outpart 128 performing the throw-in movement and vice versa, but the last section to be encountered will be part 128 which supplying a throw-out movement will leave the parts properly in position to begin a new line. The position of the selector-leads remaining the same, it will be understood that the amount of rotative movement imparted tp shaft 99 while the carrier is being moved in one direction will be equal and opposite when-the carrier has been returned, the rotative movements so obtained being transmitted from shaft 99 to the; selector shaft, 58 which latter is provided with a convex spiral screw 133, adapted to carry a traveling nut, preferably termed traveler 134 equipped with an internal spiral conforming to the spiral V133, and adapted tobe moved longitudinally of shaft 58 when the latter is being operated by coaction of the selector-leads 128 with the platen carrier. If shaft 58 be inadvertently caused to gotate in either direction more than is necessary and proper the traveler 134, will ride out of screw 133 and into engagement with an impeding spring 135 mounted upon the shaft 58 near each end,

but a. subsequent reversal of rotation being imparted to the said shaft, the impeding spring 135 will return the traveler 134 into mesh with spiral 133.

The traveler 134 has been provided with arms 136, preferably four in .number disposed so as to form a double yoke adapted to overlap but without binding the faces of an actuator wheel 137 slidably mounted upon the actuator shaft '71. I The wheel 137' thereby conforms to the movement of traveler 134 and is caused to slide laterally upon the shaft 71. The wheel 137 is provided with a slot 138 radiating from the core or shaft opening of its hub 139, which slot is adapted to acconnnodate the ridge 72 thereby permitting the wheel to be moved longitudinally of shaft 71 but being rotated thereby. The teeth 137 of wheel 137 are tapered on the sides as shown in Fig. 7, more readily permitting lateralingress and proper gearing relation with the computing group pinions. Pivotally mountedupon the right or front side of traveler 134 is a detector .140 supplied upon its upper end with a small -pivotally arranged wheel 141, and held normally against a stop 142 by the spring 143 connecting to the traveler 134.

The graduated scale commonly employed upon t'abulator stop racks for locating the printed columns is, used in .the present invention, but the series have been advanced to the right (Fig. 3) a distance equal to one step of the platen carrier, which corresponds to one space upon of this feature being to cause a locking together of pinions 104 and 105 thereby linparting fromthe gear 109 to the winding shaft 99 a unit of rotative movement which will occurone step in advance of the printing position in a column. The one steplead obtained will coinpensate for thespace occupied by the end pieces of the groups when operatively mounted, in other words the the rack 126, the object minimum intervening space separating-the lowest order belt of one group and the highestorder belt of the next succeeding group will be equal to twice the spacing arrangement of the belts constituting a group, therefore in order to place the actuator wheel 137 p in operating engagement with the highest order belt of any group it will be necessary to employ the one space lead which I obtain scale series on rack 126 one step, advancing the locative position of the controller 117 one step, and arranging the, tabulator stop arm to conform therewith.

Computing mechanism.Mounted transversely across'the front of the writing machine,- inside the front casing and secured at each end in the frame-work thereof is a horizontal bar 144 provided laterally upon its upper side with a plurality of rectangular as stated, by advancing the graduated slot-s 145 equidistantly spaced and forming a rack. Above and slightly to the rear of rack 144, but extending parallel'therewith and mounted at each end in the writing machine frame-work is another rack- 146 with equidistantly spaced lateral slots 147 terminating in the longitudinally arranged detent 148 formed in the under and foreground side of the rack. The said rack 146 is pressed downwardly by a light spring 149 and together with the rack 144 forms a suitable support for the metal cased computing groups 150 mounted thereon.

The end plates 151 of computing groups 150 are provided with a lower tenon 152 adapted to engage in the slots 145 of rack 144, and also with an upper tenon 153 adapted to belatched behind the detent 118, the groups being thereby secured in operating position but may be readily removed from the racks by lifting the detent rack 116. 15 Extending transversely across the computing group 150 and securely mounted in the end plates 151 are-the upper pulley shaft 154, the lower pulley shaft 155, the transfe i'ence or intermediate shaft 156 and the four side shafts designated respectively 157, 158, 159 and 160. The upper pulley 161 V mounted upon shaft- 151 and the lower pulley 162 mounted upon shaft 155 carry upon their peripheral surface the flexible digit 'belt 163. i

" Rigidly connecting to the right face of each pulley, 161; Fig.9, by the hub 16-1, is a spur gear 165 constantly in mesh with an operating pinion 166 rotatively mounted up'on theshaft 157', the pinion 166 being adapted to operatively gear with the actuator wheel 13? by which means a desired amount of rotative movement will be supplied to the pulleys 161 and 162. 'Mounted upon shaft, 157 and extending across the right face of pulleys 161, beneath the hub 1649,;are the booster levers 167 laterally slotted upon the upper edge so as to accommofiat-ethe lozenge shaped nib 168 supported therein and pressed by a spring 169 attached to the lever 16?. The nib 168 projects sulficiently from the side of lever 16? to permit slidable engagement upon the periphery of hub 164 and the curvilinear ridge 1T0 merging therein. A rotative movement of pulley 161, to the left Figflifi, will allow nib 168 to ride oveinand beyond the end of ridge 170 when by the retractive action of lever 16? it will fall upon the peripheral surface of hub 164, but a reverse movement of pulley 161 will cause nib 168 to follow the inclined runway 171 during which movement the nib 1,68, accommodating itself to the gradual incline of the runway will be moved outwardly in opposition to spring 169 until. having reached and passed the vanishing point of the runway the nib will be returned to norma in the depressed face 172 of 161 and upon the periphery of hub 164;. The pulleys 161 are furthermore provided upon the left hand face, Fig. 9, with a circular plate 173 having upon its peripheral surface a depression 171. A gear plate 175 is also supplied to the pulleys 161, but attached to the left face of plate 17-3 and is provided with a single transference tooth 1T6 adapted to en gage once during each complete rotationof pulley 161 with a spur gear transference wheel 177 rotatively mounted uponthe 55 transference shaft 156. .1 star wheel 1T8 connected to the right face ofgear wheel 17? and forming a constituent part thereof adaptedto be engaged once during a complete rotation of the circular plate 173 in the depression 17 1 thereon, after which the concare surface. formed between each of the points of star wheel 178 will accommodate itself to the peripheral. surface of plate 1T3 thereby preventing further rotation of gear wheel 17? until the latter is again engaged by the tooth 1760f plate 175, which engagement will occur simultaneiuisly with the engagement of a point on star wheel 178 in depression 1T1.

Rigidly secured to the left face (Fig. 9) of gear wheel 17? a small pinion 179, the parts 177. 178 and 179 rotating as one. The intermediate gear 180 ro 111 Fly mounted upon transference shaft 136 and gearing with pulley 161 and 162 supplied with a hub extending to the right Fig. 9, upon the end of which is secured a pinion 181 abutting the pinion 179 and of the same diameter. A locking arm 182, Fig. 11, is mounted upon shaft 159 and provided with a spring 183 extending to and secured in the shaft 160. the tendency of the spring being to raise the arm to horizontal. Arm 182 is also supplied with a'fixedlateral pin 181 upon which is rotatively mounted a small locking pinion 185 adapted to remain in gear with and lock together the pinions 179 and 181 excepting when for operating purposes is necessary to isolate certain parts of a group he latch 186 mounted upon shaft 160 is utilizedfor latching booster sleeve 18? and has been provided with a short pendent arm 188 to which is pivotally connected a link 189 extending horizontally and provided upon its other end with a slot 190 adapted to accommodate a stud 191 fixed in the side of the auxiliary locking lever 192 which lever is mounted upon shaft 159. 189 is provided with a right angled rctain- The link ing block 193 adapted upon unlocking movemcnt of the lever 192, as illustrated in Fig. 12, to be brought beneath the pinion carrying end of locking arm 1S2 thereby locking the pinion 185 against accidental disengagement with the pinions 179 and 181, at which time the lever 192 will be engaged by the single tooth 191 on the left hub of pulley 162. hen however the tooth 191 has passed out of engagement with the lever 192 the latter will be returned to normal partly by the action of the spring 195 connet-ting therewith and to the link 189. Upon a latching nwvcment of the sleeve 18? with latch 186 the link 189 will be displaced to the left, and the slot 190 will be moved on. stud 191 without however displacing the lever 192, after which the latch 186 will be restored by a spring 196 secured upon the side of lever 192 and pressing against the end of linl; 189.

An extension of each locking arm 182 projects rearwardly between the digit belts and forms a contact arm 197. A lateral arm 198 secured to contact arm 197 extends inside of ,of pulley 162 (Fig. 9).

to return lever 200 to normal.

the belt 163 and engages therearward side of a finger 199 forming an upright extension on. each locking lever 200, which latter are mounted upon shaft 159 and adapted to engage normally in the locking teeth 201 radially projecting from the riglLit-hand hub The collar 202 mounted upon shaft 155 between the pulleys 162 securely retains one end of a spring 203 the other end being attached to and adapted Secured to the auxiliary locking lever 192 is a lateral arm 204 extending to and overlapping the inner edge of locking lever 200 by which means the latter lever will be unlocked when lever 1.92 is engaged by tooth 194.

As will be observed in Fig. 10, the lever 200 representing the lowest order belt in a group will be unlocked by direct engagement of its finger 199 with a detector 140, the upper end of the finger having been curved outwardly similar to the contact arms' 197. The metal casings of groups 150, Fig. 1, have been provided with apertures 205 through which the digits may be observed and readings taken. An index 206 attached to the traveler 134 extends under and to the front side of the groups indicating successively the beltsto be operated. The groups 150 maybe operatively seated upon racks 144 and 146, the reversing lever raised to the upper or adding position and the sectional selector-leads positionally adjusted to represent the columns. TShe platen carrier may be moved to the right for-beginning a line and the movement will advance the traveler 134 and likewise actuator wheel 137 to the left-hand end of the writing machine. Upon operating the tabulator key the platen carrier will escape and be intercepted at the highest order position of a column by the combined stop and lead 128, which move ment will have advanced the traveler 134 a step to the right bringing actuator wheel 137 into engagement with the operating pinion 166 representing the highest order of the group, and will also bring the detector wheel 141 into engagement with the contact arm 197, which latter will thereby be moved inwardly of the group unlocking the lever 200 and also through. arm 182 disengaging the pinions 179 and 181, which will isolate the lower order belts. The next step of the platen carrier will allow lever 200 to restore and will also allow locking pinion 185 to reengage the transference pinions 179 and 181, while the traveler 134 will engage with contact arm 197 bringing into operation the mechanism for the next lower order belt and will disconnect it from those succe s. sively lower. Upon depression of a numeral key the actuator wheel 137 will berotated an amount equal to the value of the particular key depressed. If the pulleys 161 and 162 have been turned ing upon the belts an excess of nine the booster sleeve 187 will have been latched, followed immediately by the engagement of tooth 194 with lever 192 thereby unlocking the lever 200, also locking the arm 182 and unlatching the booster sleeve 187, allowing the latter to assist tooth 176 through the i ncremental transference movement.

As observed in Fig. 11 the'transference pinion 181, the operating pinion 166, and the broken gear wheel 165 upon shaft 154 belong to a higher order digit belt which would be next in the foreground, there fore in the operating movements Just described. the lever 192, gear wheel 177 and the pulleys 161 and 162 illustrated in this. View would remain inoperative. During a computation process it is necessary to connect variously with different order belts-and for accuracy have an-infallible train to the highest order in the group: In the mechanism the transference pinions 179 and 181v remain normally locked with pinions 185 and only the particular locking pinion in contact with the detectonwill be unlocked.

While the platen carrier is being moved to the right the detector, swinging on its pivot will be deflected by the arms 197 and will pass without unlocking pinion 185, but will be restored immediately by the spring 143. By this means the pinion 185 will be operated only when necessary, and all parts will remain locked by their respective members insuring against accidental displacement. To perform the process of subtraction the finger piece 87 should be moved to the lower position indicated in Fig. 1, which will bring the pinion 75 into gear with the gear sector 49 and reversel operate the actuator shaft 71.

I claim:

1. In a computing machine, the actuator or driving mechanism therefor, the c'ombi-' nation with a typewriting machineand the key-bars thereof, of a-slotted link pivoted to each numeral key-bar, a disk formed upon the upper end of each slotted link, upright' guides arranged horizontally in a row, threaded arms thereon-the arms secured to the links by adjustable nuts, a cylindrical cam attached to each upright guide, a transversely arranged transmission shaft rotatively mounted in the writing machine frame, radial arms secured tothe transmission shaft adapted to be oscillated by the cylindrical cams, interlocked computing mechanism, means for transmitting cam movement to the computing mechanism, means operating to lock the cams when in-. sufliciently actuated, a platen carrier and means controlled thereby for selecting the computing mechanism.

2. In a computing machine adapted to be detachably mounted in groups, the actuator a distance represen'tmechanism therefor, the combination with 

